Funny thing about the game ... I gave the book to my girlfriend .. since she isn't an avid reader (tried to have her start reading some)and thought that she would finish it before I could finish the game.

Basically they were all in this together, but because Cassetti got what he basically deserved Poirot presents to the Police the evidence that incriminate someone other than the passengers(someone unknown). Furthermore you discover that the girl supposedly dead is not dead afterall (this is a major change from the book).Also Pierre Michel is one of the kidnappers who in the end loved the child and coudln't kill her.(another major change from the book)